Prevalent in central and southern Europe, it is unknown how the bug reached American shores although many experts suspect that the bugs arrived with packages shipped internationally. Adult elm seed bugs spend the winter in homes or in hidden places outside homes and in the landscape. However, unlike boxelder bugs, whose peak nuisance time is in the fall and spring, the peak nuisance time of elm seed bugs is during the hottest days of summer, about mid-June through August. “We have received an abundance of calls about this pest over the last few weeks,” said Ryan Davis, USU Extension arthropod diagnostician. User Tip: Click on the "X" found on each entry below to hide specific bugs from this page's listing. “It will be interesting to see how the elm seed bug saga plays out in Utah,” Davis said. First sighted in 2009 in counties in Idaho, the Elm Seed Bug is native to Europe and how it came to North America is unknown. Yes, high heat like steam would kill elm seed bugs if applied directly to them. It is February and I have consistently disposed of 5-10 esb’s daily since summer. 1. Entries are listed below in alphabetical order. 1). Some of their common characteristics include the following: Adults are ¼ to ⅓ of an inch long. They do not reproduce indoors. They originated from Europe and mysteriously made their way to the Rocky Mountain region. Ed. The life cycle presented below is for northern Utah. Elm seed bugs feed on elm seeds and leaves but do not cause much damage to the trees. Image courtesy of USU Extension Office By Ryan Davis. Luckily, the bugs are not a concern for the health of elm trees, but they have become a nuisance pest, similar to boxelder bugs, by entering homes and buildings in the spring, late summer and fall. “Be aware that elm seed bugs can emit a pungent odor from scent glands, similar to bitter almonds, and they will leave unsightly fecal spots behind,” he said. However, unlike boxelder bugs, these bugs can emit a pungent smell, similar to bitter almonds, from their scent glands. The elm seed bug has been recognized as Utah’s newest pest. Seal cracks and crevices, especially in areas around windows, doors and vents where insects can easily gain access. It was first discovered in Utah in July 2014 and confirmed by the Utah State University Extension Utah Plant Pest Diagnostic Lab and the U.S. Department of Agriculture, Animal and Plant Health Inspection Service. black horehound, lambs ears, white mullein). We first started seeing Elm Seed bugs about 4 or 5 years ago. The elm seed bug has now been widely reported along the Wasatch Front, Cache County, east to Duchesne County, west to Tooele County and south to Grand County. Be sure to dispose of or freeze the vacuum bags before reuse. The bad news is that the elm seed bug was first found in the U.S. in 2012 in Idaho and it has already become a nuisance pest in parts of Idaho, Utah, Oregon and Washington. Elm Seed Bugs are fairly new to region and Utah. Home and building invasions generally occur from late May through late September. Boxelder bugs are always something we have seen throughout our profession in the pest control business, but the Elm Seed bug is rather new here to Utah. There are a total of (45) Utah True Bugs found in the Insect Identification database. The elm seed bug, a native of Europe, was first identified in the United States in Idaho in 2012 and in Oregon in 2013. Elm seed bugs are infesting Treasure Valley homes and bugging homeowners. Alias: Elm seed bug.These bugs are often mistakenly called box elder bugs or occasionally kissing bugs. Once these bugs land, they will die within one day. Native to Europe and the Mediterranean, the elm seed bug prefers to feed on Siberian elms, but is not picky about meals in general. While the boxelders have been in Northern Utah for a very long time, the elm seeds migrated here around 2014. The exclusion techniques described in the USU Extension, By: Ryan Davis, Utah State University Extension arthropod diagnostician and School IPM associate. But, more will continue to fly on your house during the next couple of weeks from the surrounding area. At my wits end on trying to deal with these pests! The first detec-tions of this insect were made in July The elm seed bug is an insect that has newly arrived in Colorado that feeds on the seeds of Siberian elm. A native of Europe, the elm seed bug was first identified in the U.S. in Idaho in 2012. The elm seed bug, a native of Europe, was first identified in the United States in Idaho in 2012 and in Oregon in 2013. The elm seed bug feeds on elm seeds and leaves as the name suggests. 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